Most likely, but not yet. The game looks very fun, and seems to be the sort of energetic shooter I've enjoyed in the past. However, I am going to be moving in July, and will likely be without solid internet for a while. The campaign sounds fun, but I doubt that it is worth buying the game now mostly for that mode. Plus, I think there are only about five maps at the moment.
I'd rather wait until August or September to get Splatoon. By that point, I should be settled in and a bunch of new free content will be in the wild. Tower Control reminds me of Payload in TF2, which is a good thing, and having maps that split noobs like me from ink extraordinaires will be appreciated.